CIGaussianGradient Class
Definition
Important
Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.
Generates a gradient that fades via a 2D Gaussian distribution
public class CIGaussianGradient : CoreImage.CIFilter, CoreImage.ICIGaussianGradientProtocol, IDisposabletype CIGaussianGradient = class
inherit CIFilter
interface ICIGaussianGradientProtocol
interface INativeObject
interface IDisposable
interface ICIFilterProtocol- Inheritance
- Implements
Remarks
The following example shows this filter in use
// Create the Vector that represents the Center of the gradient
var centerVector = new CIVector (100, 100); // Default is [150 150]
// Create the two colors to form the Gradient.
var color1 = CIColor.FromRgba (1, 0, 1, 1);
var color0 = CIColor.FromRgba (0, 1, 1, 1);
// Constructor the actual GaussianGradient filter
var gaussGradient = new CIGaussianGradient ()
{
Center = centerVector,
Color0 = color0,
Color1 = color1,
Radius = 280f // Default is 300
};
// The Generator Filters need to be cropped before they can be displayed
var crop = new CICrop ()
{
Image = gaussGradient.OutputImage,
// Create the Bounds based on the Size of the application Window. (UIWindow)
Rectangle = new CIVector (0, 0, window.Bounds.Width, window.Bounds.Height)
};
// Get the Final Cropped Image
var output = crop.OutputImage;
// To render the results, we need to create a context, and then
// use one of the context rendering APIs, in this case, we render the
// result into a CoreGraphics image, which is merely a useful representation
//
var context = CIContext.FromOptions (null);
var cgimage = context.CreateCGImage (output, output.Extent);
// The above cgimage can be added to a screen view, for example, this
// would add it to a UIImageView on the screen:
myImageView.Image = UIImage.FromImage (cgimage);
Produces the following output:
Constructors
| Name | Description |
|---|---|
| CIGaussianGradient() |
Creates a new CIGaussianGradient with default values. |
| CIGaussianGradient(NativeHandle) |
A constructor used when creating managed representations of unmanaged objects. Called by the runtime. |
| CIGaussianGradient(NSCoder) |
A constructor that initializes the object from the data stored in the unarchiver object. |
| CIGaussianGradient(NSObjectFlag) |
Constructor to call on derived classes to skip initialization and merely allocate the object. |
Properties
| Name | Description |
|---|---|
| AccessibilityAttributedUserInputLabels | (Inherited from NSObject) |
| AccessibilityRespondsToUserInteraction | (Inherited from NSObject) |
| AccessibilityTextualContext | (Inherited from NSObject) |
| AccessibilityUserInputLabels | (Inherited from NSObject) |
| Attributes |
Configurable attributes of the filter. (Inherited from CIFilter) |
| Class | (Inherited from NSObject) |
| ClassHandle |
The Objective-C class handle for this class. (Inherited from CIFilter) |
| Color0 |
Gets or sets the color at the center of the gradient. |
| Color1 |
Gets or sets the color at the edge and beyond of the gradient. |
| DebugDescription | (Inherited from NSObject) |
| Description | (Inherited from NSObject) |
| ExposedBindings | (Inherited from NSObject) |
| Handle |
Handle (pointer) to the unmanaged object representation. (Inherited from NSObject) |
| InputCenter |
Gets or sets the center of the gradient. |
| InputKeys |
Gets an array that contains the names of the input keys for the filter. (Inherited from CIFilter) |
| IsDirectBinding | (Inherited from NSObject) |
| IsProxy | (Inherited from NSObject) |
| Item[NSString] |
Gets the value that is identified by |
| Name |
Gets the filter name. (Inherited from CIFilter) |
| OutputImage | |
| OutputKeys |
Gets an array that contains the names of the output keys for the filter. (Inherited from CIFilter) |
| Radius |
Gets or sets the radius of the gradient. |
| RetainCount | (Inherited from NSObject) |
| Self | (Inherited from NSObject) |
| Superclass | (Inherited from NSObject) |
| SuperHandle |
Handle used to represent the methods in the base class for this NSObject. (Inherited from NSObject) |
| Zone | (Inherited from NSObject) |